There are ways to deal with this (including the injury liability issues) but they are not foolproof.  

, but its always a sobering reminder that its by no means a foolproof way to financial success.

This is not foolproof, but it can be pressurized with an air compressor at low pressure, about 50-60 pounds.

No screening is 100% fool proof, but it's also true that there ARE good tenants out there.

Concentrate on what you know and  changes you see - you will see a major change coming long before I ever will,  long before anybody else will, because "X" is your passion; they are  what you are sitting around reading about all the time.2) You should  wait until you find something you are so thoroughly sure of, based on your  wealth of knowledge, and something that is so cheap, that buying it is a fool  proof as going over to the corner and picking up the money.

They hear what they want to hear and fall for the flash over actual substance.I'm not saying this method is fool-proof, but it's Step One of smart due diligence. 

It's not fool proof but always helps to have something in writing.

I am not advising you that this is a 100% foolproof method either.  

this is not foolproof but it gives me an idea. 

This isn't 100% fool proof obviously.